Shaft-bearing.



Patented May 9, I916. 2 SHEETS-SHEET l- C. W. STEEN. SHAFT BEARlNG.APPLICATION'HLED Aue.29', 2914-. 1,182,596.

7. %v v v w 7 w a a m w m c. w. STEEN. v SHAFT BE ARING. APPLICATIONFILED A UG.29, 1914.

Patented May 9, 1916.

2 SHEETSSHEET 2 vertical type.

r mTEDfsTArps rA'rENT OFFICE.

CHARLES STEEN, NORWOOD, OHIO, ASSIGNOR TO ALLIS-CHALMERS MANUFAC- TURINGCOMPANY, OF MILWAU KEE, WISCONSIN, A CORPORATION OF DELAWARE.

SHAFT-BEARING.

To all whom it may concern) State: of Ohio, have invented a certain newand useful Improvement in Shaft-Bearings,

of which the following is a specification.

This invention relates 1n general to bear- -ings for shafts, and hasparticular relation to bearings for shafts of machines of the It is an'object of this invention to provide an improved shaft bearingconstruction, which is comparatively simple in designand eflicient inoperation.

It is a further object of this invention to provide an improvedconstruction of shaft and bearing for vertically disposed shafts,

Q a v a s o I 0 having provision for the ethcient lubrication of thehearing and shaft.

These and" other objects are attained by this invention, the variousnovel features of whiclr'will appear from the description and drawings,disclosing one embodiment of this invention, and will be particularlypointed out in the claims.

In the accompanying drawingsfil igure 1 is a partial vertical section ofa dynamo electric machine of the vertical. type, embody ing thisinvention. Fig. 2 s'an enlarged vertical sectlon'ot the upper rearing ofthe machine shown in Fig. 1. Fi 3 is an en larged vertical section ofthe l: wer b aring of the machine shown in Fig. 1. Big. 4

is an enlarged vertical section of a modification of the lower bearingconstruction of Fig; Fig. 5 is a' vertical section of a modification-ofthe upper bearing construction of Fig. 2. Fig. 6 is a vertical sectionof a further modification of upper bearing construction.

In accordance with the disclosure in the drawings, wherein the inventionis shown as being. applied to a dynamo-electric machine of the verticaltype,the yokeorframe 6 of a dynamo-electric machine. is [supported onaframe 7 An upper end casing 8 incloses the upper side of themachi'ne andis provided with a bearing housing 9, which may be integral therewith,as shown. 'A bearing housing 10 is' supported in place by the frame 7,shown as being integral therewith; and a shaft 11 operates in thebearings 9 and 10. The roto, $2 of the dynamo-electric machine, hereshown as a squirrel-cage Specification of Letters latent. Applicationfiled August 29, 1914. Serial No. 859,267.

Patented May 9, 1916.

rotor of an induction motor, is supported on the shaft 11 in position tocooperate with the stator 13. A driving pulley 14 may be mounted on theshaft 11 below the bearing housing l0.

As shown in Fig. 2, the bearing housing 9 comprises a casingportion 19and a removable cover therefor 20, the casing portron being integralwith the end casing 8. ()n the inner side of the casing, at the lowerportion thereof, spaced, integral flanges 23 are formed. A hearingbushing 24, having an external proyection 25 at its upper end,

- is placed inside the flanged portion of the casing 9 and is held inplace therein by e11 gagement of the portion 25 with shoulders 2(i ontheflanges-23. The bearing bushing I 24 may bear on the flanges 23 only atthe upper portion and a lower portion 27, as shown, intermediateportions being spaced from the flanges. The bearing'bushing 24 may beheld against angular movement by the engagement of a pin 28,securedthereto, in a. slot 29 of the flanged portion of the housing.

Keyed or otherwise secured to the shaft 11, near the upper portionthereof, is 'a sleeve 30, the lower portion 31 of which is spaced fromthe shaft 11. The spaced portion 31 is of such outer diameter as to bearona bearing portion 32 of the bushing 24,

which bearing portion may be of babbitt, bronze, etc. If the sleeve 30is keyed to the shaft, a slight taper at the portion of the shaft withwhich the sleeve engages will serve to limit the downward movement ofthe sleeve, and the same may be held at its lowerlimit of movement by anut 35 threadedion the end of the shaft and bearing on the upper end ofthe sleeve. As shown, this hearing is of the thrust type, the thrustportion 'of the bearing, of the ball type, be-

ing interposed between the lower end of the sleeve portion 31 and thelower end of the casing. This bearing comprises an upper bearing plate37 and a lower bearing plate 38 which form a race-way for hearing balls40. The upper bearing plate 3'? is held in position and the weight ofthe machine is transmitted from the sleeve 30 to the bear-. ing ballsthrough an aIinin'g WaSher 41; and the lower bearing plate 38 is held inposition through the engagement between a beveled surface on its ower'faces on portions of the flanges 23 extendside and beveled 'sur-.

ioo

I ing along the bottom of the housing. In

order to confine oil: Within thebearmg hous- -43"is secured in position,as tothe bottom 'of'thehousing;endislightly,spacedfrom the shaft Thistubes?) extends tothefupper portion of the space-between the sleeve porIancl' spaced ports45 through .thesleeve piorbeing provided with aplurality o-f spaced i longitudinal "grooves;7 closed at thelreloxverfendsk-gand open a tfltlnii npper'encls, with which the radial portsiicommunicate durupper end of the spaced sleeve, portion fiil Q radialports 48 'areprovidecl hicheet as sleeve portion 31 and tuhe 143, theport 49 throngh the sleeve 30-'serv1ng.to equalize L bushing'24.and thehearing-'portion32 may l ibeprovided with ports 54) W111 I re az ml-l'ystaggered with relationto-thep eend serve as a meiinsof communicat onbetween the: grooves fiend thespecewbetween the in'place-at thelowerencl of the casinghnd iiass" elong' the bottom of? the casingbefore ingto preventuthe'entrance of; idust'orfdirt ahoutthe shaft. I ethe bearing housingu19 isifilled ithoil to A9 afipointslightly'above'thewlower edgeof the 1' overflow ports 48', the levelzon the innerside "oftlie sleeve portion 31-he'i the Same as that onthe outer clethereof 1 through the. 'overfiowlportss chine operates, oil isifed to,theihe s-u r-- Ices fof'th e sleeve; portion 3l -"a'nd he pertBQ'lthrqughi the radial ports ;45', *the oil bein'g {forced fromtheseports 45h I "of centrifugal "force; Th1 ongitudinal "l-o'oves 47,which conimunlc c; with 'th ortsfiduring the rotetio. theflsle'eve'portion 31, are thus snppliediivith oil. A

. v ,-3; 1a-nc l the .pert,f32 ,'anrlgthle-rein along 'the groovesl'ltoithetlpp of s-in; case the bearing hiishihg: "flebe'z'uing portion32 are not providedwith per-$50 ,.and into the body portionofthe casing.lVhen. ports 50 are provided," rein f -;c(') nst ncti on. shown in 2.;la portion V he oil-passes; outthroughth upper-ends f thefgroovesAiyencl the 'IIQ inder is he ports 50 bylthie vaccumuderpasses ing end; toprevent the p'asszigef thereof downward along-"the shaft, ztt'libe orcollar tion and the shaft 1 1.5, Radiellydisposed tion'31conveyoil'fi'omthe" iniiel-lsphce to the bearing surface ofthe part 132, the latter,ing' the operation of the shaftrf Nea'r tlie overflow aneans fo thespace ibetvveeh the it the pressure onutlie two bodies", of -oil; qTheflanges-.23., A. collar or tube 51;'isseci1recl :iacts as a battletov insure thet' 'tlie oilwill passin unto the space. betwee'riithe'tubeA3' andfthe-sleevel -portion 311' 1st guertt v53 meyibe secured tothe'-ibottom 50f the cas- '1 In the ordinary operation fflieltaehine.

Y-theeijnfction.

portion of the oil. maybe ,ta-keni lip between the. bearingsurfaces. of;the ;.sleeve portion 5 end the;

the gropvesA'C and {into thespnce "between the flangesl2 3, whence itpasses downward shout the ball bearing, l and through the collar-'51 tothe, bore of the sleeve portion 31; that is, the space between ,the'tubelii a'iil thesleeve portion 81 to take the" plxce 'ofAthe oil thet haspassed there "fron for lubricating jpurposes. It is to be notedthatshsfthe oil at thebearing surfaces of"the-sleeve portion 3'1 and'thepart 32 be- I comesheatejgl; the same tends to rise to the" upperportionof the bearing bushing and thus creates a; natural circulation which assists in efficiently lubricating the hearing.

I II 'tnbe-43 is limited by the overflow ports 48.

,Theoi l levelinlthe spacebetween-the sleeve I "portion"3l and thesiniilii'r j in construction to that shown in v FigJfZ; is of the guidetype. The sleeve 30 is preferably shrunkonthe shaft 11shoulderedfportions .on the sleeve engaging .With corresponding portionson :the shaft] 1-! cover capQQI-onfthe housing 21,'fitting comparativelyclosely about the sleeve 30,- is

preferably; provided With a dust guard 57.

- Thefiangesfl23-on the side Wall'of the 'hous- .ijng,maybeprovidedWithextensions 58 integralwith-lthe bottom of the housing, these flangeextensions acting as. ba-flle plates 'to .preventthe oil from being.churned bythe action of "the rotating sleeve If I desired, plates; bedisposed" on the upper edges ot-these flange extensions58 to furtherpre,1ent,suchjehurning,action. f 1 I The operationyof, the; device shown in;Fig.

:3 'ils'qiiiteasiinilar to that ofthe structure.

shownin Fig. 2, the only difi'erence being the I absence, oil-the ballbearingand associated directly fro'mrthe specebetween the flanges 23and; along the bottom of thehousingto partS and the bafiletnbe 51;,theioil passing In the modified-;constru ction sh own in-Fig;

f, -bearing typevaifidg'eceives the lower end of W i-the verticallydisposed::sheftx1 1, Instead of hiring} a, S eliin ete; spaced sleeige,portion, f win er-memes.shown in. Figs. ,Q T-endQ 3, the shaft 1 119-"is p rovided may be considered sofnewhat analogous to the spaced sleeveportion 31 :ofthestructures- OfFigs-Q endB; The end of the shaft of theball thrnstitype, the bearing uree? being held in operative positionbythe alining Washer 38% 'whicliis disposed htweerv vmit the weight ofthe of the shaft 11 and its reduced end extension62, this washer servingto transthem achine to the thrust hearing. The bearing plate 38, havinga is held in position. by the tion on shouldered portions of the flanges23. In shouldered portions 67 ofextensions of the fianges23 along thebottom of the housing 21, is held a plate 69 having a central opening71, a tube or collar 72 being secured tothe plate about this opening andextending into the bore 61 of'the shaft for 1 an appreciable distance.The bearing bushing 24' is provided with an integral annularflange 74which is'disppsed in the space I between the ball thrust bearing and thelower part of the flanges 23 on the side wall of the housing. It is endof this flange 74 is preferably below the upper surface of the bearingplate 38, so as tdser've as a battle to preient the oil in the spacesbetween the flanges 23' from being subjected to centrifugal force due tothe rotation of the reduced portion 62- of the shaft.

The ,upper end of the bore .61 is preferably somewhat above the upperend of the bushing 24? and bearing surface 32. Radial overflow means maybe'provided, to serve as a communication between the upper end of thebore and the s ace about the bushing 24'.

The upper end 0 the casing may be closed in the same manner asis thecasing 21 of the structure shown in Fig. 3.

In the ordinary operatlon of thebearing shown in Fig. 4, the casingcontains oil to a 1 point adjacent the upper end of the bore '61.

I dially from the oil is thrown out raports by centrifugal force, to thebearing surfaces of the shaft and part 32,bein received in thelongitudinal grooves 47 in t e bearing surface taken up from thesegrooves by the shaft, flows upward or downward to the radial ports 50 inthe bushing 24 and part 32, and through these ports to the spacesbetween As the shaft rotates,

. the flanges '23. 'A portion of the oil passes out through the upperends -of the passages 47; The oil is'circulated upward in these passages47 and also downward therein and outward through the ports 50 by theaccumulated pressure therein due to the oil that is forced from theports 45. Natural circu iation, caused by-the oil that has-become heatedat the bearing surfaces, is also pres ent to some extent. The oil maypass downward in the spaces between the flanges 23 to 60.

the lower portionof the casing, the main of the oil passing beneath theplate 69 for redistribution to the bearing surfaces. A small portion ofthe oil passes up between the inner edge of the washer 65 and the ent ofsuch. beveled face with a beveled face on a washer 65, held in posito.be noted that the lower on the oil passing 32. The oil not outer edge ofthe plate 69, this body of oil being thrown out approximately radiallyto eral construction shown in Fig. 4:, is adapted for use as the upperbearing of a vertical machine, the shaft 11 passing through the lowerend of the bearing housing 19 and theupper end of the shaft beingdisposed within such housing. While this bearing is shown as being ofthe guide type, it will be apparent that it might be modified so as toact also as a thrust hearing. The casing 19 is provided with anintermediate parti- The bore 61 opens from the upper end of the shaft.and may beclosed by a removable screw cap 82. In order to insure thatthere be no leakage of'oil from the casing about the shaft 11, a packingstrip 83' may be insertd in a recess in'the lower end of the casing, anda' gland-8'11 may be used for securing the packing strip therein.Communication is established between the bore 61 of the shaft and thechamber 85, formed between the partition 81 and the lower end of thecasing, through radial ports 86;.

tion 81, preferablyintegral'with the casing.

74 which acts as abaffie.

ingly,.a pump or other forcing means, not

shown, has its inlet communicatingwith the lower part of the spacebetween theflanges f 23, through a pipe 88, and has its outletcommunicating with the chamber 85 through a pipe 89. Sufficient pressureis established from the pump to force the same through the radial ports86 and into the bore 61*.

In the operation of the construction shown" in Fig. 5,the oil, which hasbeen forced into the bot-e561, is thrown out through the radialpassagesdb to the bearing surfaces of the shaft and the part 32, andalongthe grooves 47 andthrough the radial ports 50in the bushing 24 andart 32 to the space lc'gettveen the flanges 23. f desired, the upper endof the grooves 47 may be closed, as shown at 90, to prevent forcing toogreat an amount of oil through the upper end thereof, in case thepressure within the bore 61 is excessive.

In the modification shown in Fig. 6, an upper bearing somewhat similarto that shown in Fig. 5 is disclosed. The present bearing structure,however, differs fromthat of Fig. 5 in that no pump or other forcingmeans is used, the required circulation of oil within the bearinghousing being secured without any external means. The upper ends of thegrooves 47 are preferably closed.

vided with a recessed portion 91 at "its upper end adjacent-the shaft,the inner edge of this portion being threadedvfor engagement, with athreaded flange 92 on a plate 93',

l whereby the plate is'seeured inplace. This vided,-which :affordcommunication between plate 93 is provided with a central opening 94,about which is formed a flange oroollar f 95;.tlierlower end of whichextends into the I bore 61; Small radial ports 96, may, be prothe-lowerend ofthe bore 61' andthe space thebushing 24 and the bottomotthecasing.

These radial'openings, when provided, serve 'to assist inclroulating theo l, acting to force v oil out'into the passages hetweentheflanges 23'and upward the plate 92. H

'i In" the ordinary operationof the" bearing construction, shown in Fig.(5, thehousing is filled'with oil' to a pointslightlyahove the thereinto the upper side upper set of ports 45*. As the eha ftlrotates,

- 4:5 to the lubricating 'vious modifications will oil is forced outradially through .tl'1e" ports passes through the ports'50 to theSlfiusesbe tween the flanges 23. The heated condition ot, the oil "alongwith whatever pressure may be, established therein, on aceount ofaccumulated T pressure due" to "centrifugal force, exerted by oil in theports-l5, Iis sufficient to cause the passage of the oilto the upperside of theplate- 92, whence itpasses I back through the tube-95 to thebore 61 It should he understood that it,i's no;tidesired to be limitedto'.,th.e exact details of construction shown and descrihed, for ohoccur to a. person skilled in the'art. p 1, it, 1 V v It is claimed randdesired"toizseeigrei by;

- etters Patent:

jvided with longitudinal grooves on the in- 1. In conibinatioma hearinghousing pro-- ner sidewall and with substantiallyradially extendingribsalong the iinier-sideflofthe bottom thereof, the ispaces betweensaid ribs constituting passages I coni'inunicating with i saidlongitudinal grooves, a bearing-bush ing held in plaee'in' said housing,and ash'aft p 7 having a bearing portion in the form of a; "hollowcylinder, the bore of said eylindeu portion being open toeo nr unieationwi a .the longitudinal" grooves in-said housing; througlir the passagesV fin-med etjive n, the

ri bs at the bottom' of said housing nd said oylindrieitt portion beingprovided -with v openings to afford Communication between shaftandbushingv said bore and the bearing snrfaoes of i iaid 2. combination,afibeari'n'g housing, a

one ofsaid partQbeing provided with to afford cqunrnumoa-tion betweenfeuds of said bushing, and a shaft bearing portion of saidnsh jaft beingi5 use,

v spaced from in'theforni ofa hollow cylinder throughout substantiallyits entire length, said bearing portion being provided with openings atspaced jpoints throughout its length to afford communication between thebore ofsaid cylindrical portion and the hearing surfaces of'said shaftand said bushing, and said bushing-being provided with verticallyextending; groovesgn its bearing surface and with radialports'intei'mediate its ends communicating therewith and with v k V ithe groovesvbetw een' rsaid bushing and said between the fianges 23", ata point between p housing. v

' 3 In combination, a bearin housing, a bearing bushing withinsaidliousing and spaced from the bottom thereof, one of said parts beingprovided with one or more longitudinal grooves. providing communicationbetween portions ofsaid housing at the up per and, lowerends of saidbearing bushing and asha'ft within saidbearlng bushing, the

affording comxnunication between the interior recess of said shaft'andthe bearing surfaces ofsaid shaft and said bushing, and: I

said"bearing;bushing being provided with passages'afiordlng(30mml1111021l310n1 between the bearing surface of sa d bushing andslongitudinal grooves, thepassages of s is.

shaft and said bushing being staggered rel'a tively to; e'achfother.

-t. In combination, a

bearing housing, a

bearing bushing within said housing and spaced from the-bottom thereof,one of said parts being provided itii. longitudinal pain sages affordingeomniunieation between portlonsof saidhousingat the upper and lowerends, of said bearing bushing and a shaft \Vll l1ll'1"St1ld housinghaving a bearing portion of hollow cylindrical form, said bean vnghojusmg being provided with "s'ubstantially radially extending ribs orflanges at the lowest point of'l the inner side of the bottoin thereoffor-preventing ehurningof oil at the Tbottoin of. saidhousing.

5. In eombinatioinfa bearing, housing,

h'ringbushingwithin said housing and a witliin said be ng'housing andhaving its I bearing portioi fo hollow cylindrical form and spacedfroinjthe tiom ofsaid housing, ribs formed on theinne'r side of thebottom of mn111m s1ng, and; a thrust bearing supported inoperativeposition on said ribs and i w operatively associated with the bearingportion, of ,saidfshaft; 5'

bearing"bushing"within id housing and I i I I 6.111 combination a bearinhousin a i 4 3 h '17 having portions thereof [spaced Ifrom said housingto "oonstitutefl passages affording KOlllllllltllCiLlllOl'l between theportions of said lbottfom thereof, a" shaft 1 bushing, a shaft withinsaid bearing bushing and having its bearing portion of hollo'wcylindrical form, a thrust bearing sup- ,ported'in operative position atthe bottom f said housing and operatively associated ,with the lower endof'the bearing portion beneath said thrust bearing and afi'ordingommunication between said first mentioned passageways and a pointradially within *said thrust bearing, and a tubular guide supported atthe bottom of said housing and oprative to insure the passage of oilaxially the bearing portion of said shaft.

7. In combination, a bearing housing, a bearing bushing mounted in saidhousing, one of said parts being provided with *grooves 'to affordcommunication between ring portion of said shaft'being in the form of'ahollow cylinder, said'bearin portion eing provided with openings to a rdcomrical portion and the bearingsurfaces of said shaft and saidbushing,said bearing ousing being provided with ribs at the inner side of thebottom forming passageways communicating with said grooves, a artsupported by said ribs and provided ith a beveled seat, and a thrustbearing eat and associated with the beveled part on thrust bearing,saidthrust bearing forming a seat for the cylindrical bearing portion ofc :said housing 1 p 8. In combination, a bearing housing,.a 5 bearingbushing mounted in said housing, one of; said parts-being provided witha ousing at the upper andlower ends of said fsaid shaft, passagewaysbeing provided:

hrough said'thrust bearing to the bore of the ends of said bushing, ashaft, the bear munication between the bore of said cyli'nrovided with acorrespondingly beveled raid housing and serving to center said" groovesto afford communication between the portions of sald housing at the endsof said bushing, a shaft, the bearing portion ofsaid shaft being in theform of a hollow cylinder, said bearing portion being provided withopenings to afford communication between the inner recess of saidcylindrical portion andthe bearing surfaces of said shaft and saidbushing, ribs associated with the bottom of said housing and providingpassageways communicating with said grooves, and a plate seated onsaidribs and provided "with a tubular portion afford- -ing communicationbetween the passagebetween the portions of said housing at the endsofiisaid bushing, a shaft, the bearing portion of said shaft being inthe form of a hollow cylinder, said bearing housing b3- ing providedwith ribs extending along tli'e inner side-of the bottom of, saidhousing, a

thrust;bearing seated on said ribs and operatively associated with thebearing portion. of saidshaft, said bearing bushing having a downwardlyextending annular projection disposed betweenv and having portionsspaced from said thrust bearing and the side wall-of said housing.

In testimony whereof, the signature of the inventor is aflixed'hereto inthe presence of two witnesses (:HARLns W. s'rnnN.

Witnesses:

ADAM ITTEL, CnAs. F. WARNER.

